Locality 28, Arroyo Liebre - Beal (1948): Early/Lower Miocene - Middle Miocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Clypeasteroida
- Clypeasteridae
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Clypeaster sp.
Lamarck 1801
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| Listed as Clypeaster sp. nov. | ||||||||||
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Echinoidea
- Clypeasteroida
- Scutellidae
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Scutella ? sp.
Lamarck 1816
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| Listed as "Scutella sp. nov." | ||||||||||
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Gastropoda
- Trochidae
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Chlorostoma gallina
(Forbes 1850)
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Gastropoda
- Turbinidae
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? Leptothyra sp.
Pease 1869
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| synonym of Collonista | ||||||||||
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Gastropoda
- Opisthobranchia
- Cylichnidae
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Scaphander sp.
Monfort 1810
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Gastropoda
- Turritellidae
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Turritella cf. ocoyana
Conrad 1855
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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? Crepidula sp.
Lamarck 1799
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Gastropoda
- Naticidae
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Natica reclusiana
Deshayes 1839
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| recombined as Glossaulax reclusiana | ||||||||||
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Gastropoda
- Neogastropoda
- Olividae
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Oliva aff. venulata
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Gastropoda
- Neogastropoda
- Muricidae
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Cuma cf. tecta
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| synonym of Thais | ||||||||||
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Gastropoda
- Strombidae
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Strombus sp.
Linnaeus 1758
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Gastropoda
- Cypraeidae
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Ovulum ? sp.
Linnaeus 1758
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Bivalvia
- Mytilida
- Mytilidae
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Mytilus mathewsonii
Gabb 1866
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| recombined as Crenomytilus mathewsoni | ||||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Pecten crassicardo
(Conrad 1856)
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| recombined as Lyropecten crassicardo | ||||||||||
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Bivalvia
- Arcida
- Arcidae
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? Arca sp.
Linnaeus 1758
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Bivalvia
- Cardiida
- Cardiidae
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Cardium aff. meekianum
Gabb 1866
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| recombined as Clinocardium (Clinocardium) meekianum | ||||||||||
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Bivalvia
- Cardiida
- Solecurtidae
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Psammosolen sp.
Risso 1826
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| synonym of Solecurtus | ||||||||||
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Bivalvia
- Cardiida
- Tellinidae
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Tellina sp.
Linnaeus 1758
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Macoma nasuta
(Conrad 1837)
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Bivalvia
- Cardiida
- Veneridae
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Chione undatella
(Sowerby I 1835)
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Dosinia cf. dunkeri
(Philippi 1844)
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Bivalvia
- Cardiida
- Mactridae
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? Spisula sp.
Gray 1837
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= Mactromeris sp.
Conrad 1868
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Moore 2003 | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula cf. luteola
Carpenter 1864
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| recombined as Caryocorbula luteola | ||||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Phacoides nuttalli
(Conrad 1837)
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| recombined as Lucinisca nuttalli | ||||||||||
| Subspecies: Phacoides nuttalli var. antecedens | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Baja California Sur | County: | Magdalena Bay |
| Coordinates: | 24.6° North, 112.0° West (view map) | ||||
| Paleocoordinates: | 21.8° North, 102.5° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early/Lower Miocene - Middle Miocene | ||
| Age range of interval: | 23.03000 - 11.63000 m.y. ago |
Stratigraphy
| Formation: | Ysidro | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The Ysidro Formation consists of dirty-white sandstone, underlying the Comondu Formation. The formation varies in lithology from place to place and apparently becomes more tuffaceous towards the gulf coast. The formation can be subdivided into two members, a lower shale member and an upper sandstone member. | |||||
Lithology and environment
| Primary lithology: | white lithified sandstone |
| Includes fossils? | Y |
| Lithology description: Dirty white sandstone. | |
| Environment: | coastal indet. |
| Geology comments: Shallow marine assemblage. No specific paleoenvironmental data presented. | |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | selective quarrying,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Collections made. No known repository. | |
| Taxonomic list comments:Representative. | |
Metadata
| Also known as: | Loc. 28 | ||
| Database number: | 43809 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-08-26 10:11:37 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-08-26 10:11:37 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 11515. | C. H. Beal. 1948. Reconnaissance of the geology and oil possibilities of Baja California, Mexico. Geological Society of America Memoir 31 [A. Miller/A. Hendy/A. Hendy] |
Secondary references:
| 32797 | E. J. Moore. 2003. Tertiary marine pelecypods of California and Baja California: Crassatellidae through Pharidae. United States Geological Survey Professional Paper 1228(F):1-107 [A. Hendy/A. Hendy/J. Marcot] |